HomeNewsTrendsExplained | How the new vaccination drive is expected to roll out

Explained | How the new vaccination drive is expected to roll out

On April 19, the central government announced a major shift in its Covid-19 vaccination strategy. Moneycontrol takes a look at what these changes mean.

April 23, 2021 / 11:16 IST
Story continues below Advertisement
(Representative image)
(Representative image)

On April 19, the central government announced a major shift in its Covid-19 vaccination strategy. So far it was procuring vaccines from the two major manufacturers, Bharat Biotech (which makes Covaxin) and Serum Institute of India (Covishield), and then passing it onto states. Now, state governments, private hospitals and companies can directly buy from these vaccine-makers at a pre-declared price and begin distribution from May 1. Below is a primer on how the new vaccination drive will work.

How will the new vaccination drive work?

Story continues below Advertisement

The new plan calls on vaccine makers to supply 50 percent of their monthly doses tested at the Central Drugs Laboratory (CDL) to the centre. They are free to supply the remaining 50 percent doses to state governments and in the open market to private hospitals and companies at a pre-declared price.

Let’s take an example. Say, a company has made 100 doses of a vaccine. Here is how vaccines are distributed under the existing policy:

COVID-19 Vaccine
Frequently Asked Questions

View more

How does a vaccine work?

A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.

How many types of vaccines are there?

There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.

What does it take to develop a vaccine of this kind?

Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.
View more
+ Show